Data Type Integer (integer field: A type of field whose content is a whole number. Examples include the ID and Unique ID fields.)
Entry Type Calculated (calculated field: A field in which the value is determined by Project based on information in other fields. Project may recalculate the value automatically or when you specify, depending on your choice of calculation settings.)
Description The Task ID field contains the number that Project assigns to each task as you add it to the project. The Task ID indicates the position of the task with respect to the other tasks.
How Calculated As you create tasks, Project automatically assigns the next number in the sequence of tasks as listed. This becomes the Task ID.
Best Uses The Task ID field for assignments only appears in the Task Form view. It also appears in the Assignment Mapping dialog box, which you can use when importing (importing: Transferring data into Project from a source program, such as Excel. When you import data, you choose a map that defines how the data in the source program should be mapped to information in Project.) or exporting (exporting: Transferring data from Project to another program, such as Excel. When you export data, you choose or create a map that specifies the relationship between the fields in Project and the columns in the ouptut file.) assignment dates.
Example You want to export assignment dates to an Excel workbook. You create your export map and include the Task ID field along with other assignment information to be exported to Excel.
Remarks To export the Task ID field to another program, in the Save as type dialog box, select the name of the file format that you are exporting to (for example, Access Database or Excel Workbook). and then complete the steps in the Export Wizard.
If you need an ID that indicates the sequence in which the assignment was made, regardless of placement in the schedule, use the Unique ID (assignment) field.